Chrysanthemum plant named ‘Yojuneau’

ABSTRACT

A new and distinct cultivar of  Chrysanthemum  plant named ‘Yojuneau’, characterized by its upright, outwardly spreading and uniformly mounded plant habit; moderately vigorous growth habit; freely branching habit; dark green-colored foliage; uniform, freely and early flowering habit; daisy-type inflorescences with white-colored ray florets and green-colored disc florets; and excellent postproduction longevity.

Botanical designation: Chrysanthemum×morifolium.

Cultivar denomination: ‘Yojuneau’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Chrysanthemum plant, botanically known as Chrysanthemum×morifolium, commercially grown as a pot-type Chrysanthemum and hereinafter referred to by the name ‘Yojuneau’.

The new Chrysanthemum is a product of a breeding program conducted by the Inventor in Fort Myers, Fla. The objective of the breeding program is to create new pot-type Chrysanthemum cultivars that are suitable for year-round production with uniform plant growth habit, freely branching habit, good vigor, desirable inflorescence form and floret colors, fast response time and excellent postproduction longevity.

The new Chrysanthemum originated from a cross-pollination made by the Inventor in February, 2003, in Salinas, Calif. of Chrysanthemum×morifolium ‘Yodurban’, not patented, as the female, or seed, parent with a proprietary selection of Chrysanthemum×morifolium identified as code number YB-A1635, not patented, as the male, or pollen, parent. The new Chrysanthemum was discovered and selected by the Inventor as a single flowering plant within the progeny of the stated cross-pollination in a controlled greenhouse environment in Fort Myers, Fla. in November, 2003.

Asexual reproduction of the new Chrysanthemum by vegetative tip cuttings was first conducted in a controlled greenhouse environment in Fort Myers, Fla. in February, 2004. Asexual reproduction by cuttings has shown that the unique features of this new Chrysanthemum are stable and reproduced true to type in successive generations.

SUMMARY OF THE INVENTION

Plants of the new Chrysanthemum have not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment such as temperature, daylength and light intensity, without, however, any variance in genotype.

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘Yojuneau’. These characteristics in combination distinguish ‘Yojuneau’ as a new and distinct pot-type Chrysanthemum cultivar:

-   -   1. Compact, upright, outwardly spreading and uniformly mounded         plant habit.     -   2. Moderately vigorous growth habit.     -   3. Freely branching habit.     -   4. Dark green-colored foliage.     -   5. Uniform, freely and early flowering habit.     -   6. Daisy-type inflorescences with white-colored ray florets and         green-colored disc florets.     -   7. Excellent postproduction longevity with inflorescences         maintaining good substance and color for about five weeks in an         interior environment.

Plants of the new Chrysanthemum differ from plants of the female parent, ‘Yodurban’, primarily in ray floret color as plants of ‘Yodurban’ have ivory pink-colored ray florets. In addition, plants of the new Chrysanthemum flower about 1.5 weeks earlier than plants of ‘Yodurban’.

Plants of the new Chrysanthemum differ from plants of the male parent selection primarily in pollen production as plants of the new Chrysanthemum do not produce pollen whereas plants of the male parent selection produce pollen.

Plants of the new Chrysanthemum can be compared to plants of Chrysanthemum×morifolium ‘Yotahoe’, disclosed in U.S. Plant Pat. No. 16,639. In side-by-side comparisons conducted in Fort Myers, Fla., plants of the new Chrysanthemum primarily from plants of ‘Yotahoe’ in the following characteristics:

-   -   1. Plants of the new Chrysanthemum were more compact than and         not as vigorous as plants of ‘Yotahoe’.     -   2. Plants of the new Chrysanthemum and ‘Yotahoe’ differed in         disc floret color as plants of ‘Yotahoe’ had yellow-colored disc         florets.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying photographs illustrate the overall appearance of the new Chrysanthemum. These photographs show the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photographs may differ slightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Chrysanthemum.

The photograph at the bottom of the sheet comprises a side perspective view of typical flowering plants of ‘Yojuneau’ grown in a container.

The photograph at the top of the sheet is a close-up view of typical inflorescences of ‘Yojuneau’.

DETAILED BOTANICAL DESCRIPTION

The aforementioned photographs and following observations and measurements describe plants grown in Leamington, Ontario, Canada during the late spring in a glass-covered greenhouse and under conditions and practices which approximate those generally used in commercial pot-type Chrysanthemum production. During the production of the plants, day temperatures ranged from 20° C. to 24° C., night temperatures ranged from 15° C. to 17° C. and light levels ranged from 4,000 to 6,000 foot candles. Four unrooted cuttings were directly stuck in 15-containers, exposed to long day/short night conditions, and pinched about two weeks later. One week after the pinch, the photoinductive short day/long night treatments were started. Plants used in the photographs and for the description had been growing for ten weeks and were grown as spray-types. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2001 Edition, except where general terms of ordinary dictionary significance are used.

-   Botanical classification: Chrysanthemum×morifolium ‘Yojuneau’. -   Parentage:     -   -   Female, or seed, parent.—Chrysanthemum×morifolium             ‘Yodurban’, not patented.         -   Male, or pollen, parent.—Proprietary selection of             Chrysanthemum×morifolium identified as code number YB-A1635,             not patented. -   Propagation:     -   -   Type.—Terminal vegetative cuttings.         -   Time to initiate roots.—About four days at temperatures of             21° C.         -   Time to produce a rooted young plant.—About ten days at             temperatures of 21° C.         -   Root description.—Fine to thick, fibrous; white in color.         -   Rooting habit.—Freely branching; moderately dense. -   Plant description:     -   -   Appearance.—Herbaceous daisy pot-type Chrysanthemum             typically grown as a natural spray type. Compact; stems             upright and outwardly spreading giving a uniformly mounded             appearance to the plant. Freely branching habit, about five             lateral branches develop after removal of terminal apex             (pinching); dense and full plant habit. Moderately vigorous             growth habit.         -   Plant height.—About 25 cm.         -   Plant width.—About 23 cm.         -   Lateral branches.—Length: About 21 cm. Diameter: About 5 mm.             Internode length: About 2 cm. Strength: Strong. Texture:             Pubescent; longitudinally ridged. Color: Close to 146B. -   Foliage description:     -   -   Arrangement.—Alternate, simple.         -   Length.—About 6.3 cm.         -   Width.—About 4.2 cm.         -   Shape.—Palmately lobed.         -   Apex.—Cuspidate.         -   Base.—Attenuate.         -   Margin.—Palmately lobed, sinuses between lateral lobes             parallel.         -   Texture, upper and lower surfaces.—Fine pubescence; veins             prominent on lower surface.         -   Color.—Developing leaves, upper surface: Close to N137A.             Developing leaves, lower surface: Close to 137B. Fully             expanded leaves, upper surface: Close to N137A; venation,             close to 147B. Fully expanded leaves, lower surface: Close             to 147B; venation, close to 147B.         -   Petiole.—Length: About 1.6 cm. Diameter: About 2 mm.             Texture, upper and lower surfaces: Pubescent. Color, upper             and lower surfaces: Close to 137B. -   Inflorescence description:     -   -   Appearance.—Daisy-type inflorescence form with elongated             oblong-shaped ray florets. Inflorescences borne on terminals             above foliage. Disc and ray florets arranged acropetally on             a capitulum. Typically grown as a spray-type.         -   Fragrance.—Faint; slightly sour.         -   Flowering response.—Under natural conditions, plants flower             in the autumn/winter in the Northern Hemisphere. At other             times of the year, inflorescence initiation and development             can be induced under short day/long night conditions (at             least 13.5 hours of darkness). Early flowering habit; plants             exposed to two weeks of long day/short night conditions             followed by photoinductive short day/long night conditions             flower about 7.5 weeks later.         -   Postproduction longevity.—Inflorescences maintain good color             and substance for about five weeks in an interior             environment; inflorescences persistent.         -   Quantity of inflorescences.—Freely flowering, about seven to             nine inflorescences develop per lateral stem.         -   Inflorescence bud.—Height: About 1.9 cm. Diameter: About             1.2 cm. Shape: Oblate. Color: Close to 157D.         -   Inflorescence size.—Diameter: About 7.2 cm. Depth (height):             About 2.3 cm. Diameter of disc: About 1.4 cm. Receptacle             height: About 6 mm. Receptacle diameter: About 1.8 cm.             Receptacle color: Close to 137B.         -   Ray florets.—Shape: Elongated oblong. Orientation: Initially             upright, with development, close to 70° from vertical.             Aspect: Mostly flat. Length: About 3.3 cm. Width: About             1 cm. Apex: Rounded to broadly acute. Base: Attenuate; short             corolla tube. Margin: Entire. Texture, upper and lower             surfaces: Smooth, glabrous; velvety. Number of ray florets             per inflorescence: About 26 arranged in about two whorls.             Color: When opening, upper and lower surfaces: Close to             N155B. Fully opened, upper surface: Close to N155C. Fully             opened, lower surface: Close to N155D.         -   Disc florets.—Arrangement: Massed at center of receptacle.             Shape: Tubular, elongated. Apex: Five-pointed. Length: About             7 mm. Diameter: About 1.5 mm. Number of disc florets per             inflorescence: About 220. Color, immature: Apex: Close to             N144B. Mid-section: Close to 145C. Base: Close to 145D.             Color, mature: Apex: Close to 151C. Mid-section: Close to             145C. Base: Close to 145D.         -   Phyllaries.—Number of phyllaries per inflorescence: About 26             arranged in about two whorls. Length: About 8 mm. Width:             About 2.5 mm. Shape: Narrowly elliptical. Apex: Acute. Base:             Truncate. Margin: Entire. Texture, upper surface: Smooth,             glabrous; waxy. Texture, lower surface: Pubescent. Color,             upper surface: Close to 146A. Color, lower surface: Close to             N137B.         -   Peduncles.—Length: About 3 cm to 3.7 cm. Diameter: About             2 mm. Angle: About 45° from vertical. Strength: Strong,             flexible. Texture: Pubescent. Color: Close to 146A.         -   Reproductive organs.—Androecium: Not observed. Gynoecium:             Present on both ray and disc florets. Pistil length: About             8 mm. Stigma shape: Bi-parted. Stigma color: Close to 2A.             Style length: About 6 mm. Style color: Close to 154D. Ovary             color: Close to N155D.         -   Seed/fruit.—Seed and fruit production has not been observed. -   Disease/pest resistance: Resistance to pathogens and pests common to     Chrysanthemums has not been observed on plants grown under     commercial conditions. -   Temperature tolerance: Plants of the new Chrysanthemum tolerate     temperatures ranging from about 5° C. to about 38° C. 

1. A new and distinct Chrysanthemum plant named ‘Yojuneau’ as illustrated and described. 